I bought a 2 pack of TechMatte USB Type C to Micro USB adapters from Amazon. They were reviewed by Benson as being updated by the manufacturer to meet the USB C specs. I'm happy to report the set I received indeed is to spec. I'm very happy with these adapters as I've got plenty of cables and these work fine - I don't always need fast charging - using an old ac adapter at home or 12v adapter in the car is just fine. They cost only $10 for 2 of the TechMatte adapters. I'd post a link but I'm not allowed to post links yet - just search for them on Amazon.

The Google cables are great. However, MonoPrice gets their USB C cables from the same manufacturer and sells them for $5 less.

Posted via the Android Central app on my Nexus 5X with Project Fi

Thanks to this post, I ordered from them. The cable is great, their customer service, not so much. It took multiple calls to get someone to look into what's going on with my order. It finally got to me, and the shipment was wrong too. However, the last person I spoke to was great.

I also bought a pair of the TechMatte adapters and have been happy with them. Also an Anker 1m A to C cable, and a TechMatte 5ft cable to use on my nightstand with a regular USB charger. No fast charging, but fine for overnight charging. The TechMatte cable was only $6 on Amazon, and the Anker was $10.